In case you want to sell few items to your customers for free under some schemes or offers, then you can do that in Book Keeper with the following steps :
- Go to Transactions > Invoice > Create
- While creating invoice, Select items which you are selling it for free.
- Once you have selected item, enter the quantity which you have given to your customer for free and set rate as 0.
- For more information, you can add the narration in item description against your item that these items you have sold for free for further reference.
After doing the above steps, your quantity will get reduce without having any effect on rates.